CN101764550A - Integrated protection controller for wireless intelligent motor - Google Patents
Integrated protection controller for wireless intelligent motor Download PDFInfo
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- CN101764550A CN101764550A CN200910309519A CN200910309519A CN101764550A CN 101764550 A CN101764550 A CN 101764550A CN 200910309519 A CN200910309519 A CN 200910309519A CN 200910309519 A CN200910309519 A CN 200910309519A CN 101764550 A CN101764550 A CN 101764550A
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Abstract
The invention discloses an integrated protection controller for a wireless intelligent motor. The integrated protection controller comprises a DSP processing center, a power supply, a DI input unit, a DO output unit, a dot-matrix color LCD, a ZigBee wireless network, a 485 bus communication network, a 232 serial communication network, an AO output unit and a keyboard; wherein the ZigBee wireless network, the 485 bus communication network and the 232 serial communication network are respectively connected with the centralized control, monitor and display device of an upper computer. The power supply adopts 380VAC alternating current which is converted through an AD converter after passing through a voltage acquisition device and a current transformer. The DSP processing center is connected with a start-stop button and an emergency stop button. Compared with the prior art, the integrated protection controller has the advantages that on-site construction and wiring are not required, so that cables can be reduced; the construction and the networking are simple, later maintenance to the equipment can be simplified, intelligent control can be realized, failures can be predicated, eliminated and examined on line in real time, the production capacity can be improved, and the cost can be saved.
Description
Technical field:
The present invention relates to a kind of electric motor protective device.
Background technology
Motor protecter is a kind of new-style electronic multifunctional motor comprehensive protector that just grows up nearest more than ten years.It integrated (gently) and carried low-voltage variations such as protection, phase shortage, mistake (owing) pressure, stall, electric leakage, ground connection and three-phase imbalance protection; have the setting accuracy height, economize on electricity, be active in one's movements, advantage such as reliable operation, be the desirable substitute products of traditional thermal relay.It normally is made up of current sensor, comparison circuit, DSP or several sections such as single-chip microcomputer, exit relay; at present on the market abroad just like products such as AB, Schneiders; home brands are often opened up general, refined reach etc. as Zhuhai; should domestic electric machine protector producer be to grow up in nearly 10 years; be in the starting stage now; domestic electric machine control is at present used or is applied as the master with tradition, but also has part enterprise to begin to adopt motor protecter.
At present become essential of new construction based on the control system of PLC, DCS etc., factory adopts " PLC or DCS control system+power distribution cabinet+local control box " mode that on-the-spot motor device is implemented control and supervision more at present.Must connect the controlled function that could realize by cable between the three to motor device.With control separate unit common electric machine is example, needs one 6 core cable between control cubicle and the power distribution cabinet at least, needs one 4 core cable between control cubicle and the local control box at least.After control cubicle, power distribution cabinet, local control box are in place, on-the-spotly need the time and efforts of cost several months to install, trench excavation, arrangement cable testing bridge, cabling, cable is imitated work such as line, debugging, is the power that consumes again consuming time.Being configured to of at present typical factory's low-voltage distribution system: each drawer must use at least 6 core cables effectively to be connected with the IO module of PLC or DCS control cubicle.Each drawer must use at least 4 core cables effectively to be connected with local control box.Related to a lot of devices in this configuration: contactor, circuit breaker, auxiliary relay, terminal, heat continue, IO module etc., and be unsuitable for like this and fix a breakdown a little, the maintenance cost height, standby redundancy is many; And only can monitor operation, stop, power supply, 4 switching value signaling points of remote control.
The principle of " wireless intelligent motor protector " as schematically shown in Figure 1, used seldom device as can be seen from Figure, be very easy to fix a breakdown a little, do not need cabling yet, can not have the control room enough and just can be protected the harm that faults such as the overload of every motor, stall, short circuit, underloading, imbalance, the phase failure, overvoltage, under-voltage, electric leakage, zero sequence cause; Measure in real time and demonstration three-phase current and phase angle thereof; Three-phase voltage and phase angle thereof; Three-phase line voltage and phase angle thereof; Single-phase active power, reactive power, apparent power; The total active power of three-phase, total reactive power, total apparent power; Power factor, frequency; Active electrical degree (KWH), idle electric degree (KVARH), apparent electric degree (KVAH); Also have other as harmonic analysis, switching value input and output, communication function, event recording function, self-diagnostic function etc.For plant produced provides more decision information.
At present applicable cases,,, factory saved lot of manpower and material resources and valuable time for going into operation early if use motor protecter can save work consuming time such as trench excavation, arrangement cable testing bridge, cabling, cable effect line.Can also reduce the fault point after using motor protecter, standby redundancy also greatly reduces, and provides strong assurance for later factory has an accident to resume production fast.
Summary of the invention
The technical problem to be solved in the present invention is; a kind of integrated protection controller for wireless intelligent motor is provided; prior art exists lay a large amount of cables, trench-digging, bridge formation frame in earlier stage to overcome; cost increases, and that later maintenance cost height, fault are got rid of is difficult, the Information Monitoring amount is little, can't monitor, not reach deficiency such as intellectuality in real time.
The technical solution used in the present invention is: it comprises
The DSP processing center is used for the associative operation of each analog quantity of calculation process, digital quantity, operating electrical machines start and stop simultaneously, and the real content of decision LCD, response and acknowledge communication function, he is the core at native system scene;
Power supply is used for the electric energy of whole system is supplied with;
The DI loader is used for the input of user DI signal and gathers;
The DO follower is used for the output of user DO control signal;
LCD dot matrix colour liquid crystal display device is used for providing the relevant interface that shows to the user;
The ZigBee wireless network is used for one of wireless monitor data communication of field apparatus and Surveillance center or equipment and equipment;
485 bus communication networks are used for one of wireless monitor data communication of field apparatus and Surveillance center or equipment and equipment;
232 serial communication networks are used for that host computer reads field equipment data or the communication of software upgrading;
The AO follower is used for the AO output control of user to field apparatus;
Keyboard is used for the on-the-spot associative operation of user.
ZigBee wireless network, 485 bus communication networks, 232 serial communication networks connect host computer centralized control, monitoring, display respectively.
Power supply use the 380VAC alternating current through voltage pressure, current transformer after the AD converter conversion.
The DSP processing center with open, stop and emergency stop push button is connected.
The basic principle of above technical scheme is: motor is in service usually abnormal running status can to occur.These abnormal running statuses comprise: overload, stall, short circuit, underloading, imbalance, the phase failure, overvoltage, under-voltage and electric leakage.Electric motor protecting is to detect three-phase voltage U A, UB, UC, making on the basis of three-phase current IA, IB, IC and leakage current IL.Detailed process is as follows:
(1) by radio communication or RS485 mode, sends control signal, realize the start and stop of Long-distance Control motor device by PC, PLC or DCS;
(2) sampling three-phase voltage, three-phase current and leakage current obtains instantaneous value;
(3) utilize different algorithms that data are handled and calculated, obtain effective value, active power, reactive power, power factor, the frequency of three-phase voltage, electric current; Active electrical degree (KWH), idle electric degree (KVARH), apparent electric degree (KVAH), harmonic analysis, switching value input and output, analog quantity input and output, event recording function, self-diagnostic function etc.
(4) judge whether whether motor is in abnormal running status, need output protection;
(5) data are presented on this machine dot matrix color LCD or by communication data are sent to Surveillance center and show.
(6) by radio communication or RS485 mode data are sent to PC or other PLC, DCS.
(7) host computer is concentrated monitoring, demonstration, control, statistics etc.
Compared with prior art; the present invention can connect up by site operation; easy by wireless networking, can safeguard by simplified apparatus that monitoring Information Monitoring amount is big; the real time monitoring field apparatus; predict the equipment present situation in advance, intelligent decision protection motor reduces the manpower spending; improve production capacity, save cost etc.
Description of drawings
Fig. 1 is the control principle figure of the control separate unit motor of present most producers, " PLC or DCS control system+power distribution cabinet+local control box " schematic diagram promptly commonly used at present;
Fig. 2 is the control principle figure of wireless intelligent motor protector of the present invention;
Fig. 3 is schematic diagram of the present invention, system principle diagram;
Fig. 4 is schematic diagram of the present invention, application system network diagram;
Fig. 5 is the main program flow chart of schematic diagram of the present invention, DSP processing center;
Fig. 6 is schematic diagram of the present invention, communication host, slave flow chart.
Embodiment
Embodiments of the invention: the present invention is detected, is protected the harm that faults such as the overload of motor, stall, short circuit, underloading, three-phase imbalance, the phase failure, overvoltage, under-voltage, electric leakage, zero sequence cause; Measure in real time and demonstration three-phase current and phase angle thereof; Three-phase voltage and phase angle thereof; Three-phase line voltage and phase angle thereof; Single-phase active power, reactive power, apparent power; The total active power of three-phase, total reactive power, total apparent power; Power factor, frequency; Active electrical degree (KWH), idle electric degree (KVARH), apparent electric degree (KVAH); Also have other as harmonic analysis, switching value input and output, communication function, event recording function, self-diagnostic function etc.Use the present invention can replace devices such as ammeter, voltmeter, current transformer, thermal relay, current transducer, the time relay and leakage relay.Utilize the programmability of controller, can be set various protection parameters according to concrete condition such as rated current, the protective feature etc. of motor.Meaning the present invention includes as shown in Figure 3, Figure 4
The DSP processing center is used for the associative operation of each analog quantity of calculation process, digital quantity, operating electrical machines start and stop simultaneously, and the real content of decision LCD, response and acknowledge communication function, he is the core at native system scene;
Power supply is used for the electric energy of whole system is supplied with;
The DI loader is used for the input of user DI signal and gathers;
The DO follower is used for the output of user DO control signal;
LCD dot matrix colour liquid crystal display device is used for providing the relevant interface that shows to the user;
The ZigBee wireless network is used for one of wireless monitor data communication of field apparatus and Surveillance center or equipment and equipment;
485 bus communication networks are used for one of wireless monitor data communication of field apparatus and Surveillance center or equipment and equipment;
232 serial communication networks are used for that host computer reads field equipment data or the communication of software upgrading;
The AO follower is used for the AO output control of user to field apparatus;
Keyboard is used for the on-the-spot associative operation of user.
Above-described ZigBee wireless network, 485 bus communication networks, 232 serial communication networks connect host computer centralized control, monitoring, display respectively.
Power supply use the 380VAC alternating current through voltage pressure, current transformer after the AD converter conversion.
The DSP processing center with open, stop and emergency stop push button is connected.
DSPhttp: //the article.ednchina.com/word/231697.aspx processing center is a digital signal processor, has the structure that streamlined operating function and monocycle finish multiplication, can carry out spectrum analysis in real time by its system that forms.14 A/D converter MAX126 are with variable connector and sampling holder at a high speed, are suitable for very much the collection of motor signal.In order to realize reliably protecting to motor, with TMS320LF2407 be core, overload, underloading, imbalance, the phase failure, overvoltage and most common failure such as under-voltage are had the comprehensive detection defencive function.
The hardware that is adopted is selected for use as follows:
CPU selects the TMS320LF2407 of TI company for use, and its plenty hardware resources has obtained sufficient application in system, adds a spot of peripheral components, has just constituted a perfect in shape and function, easy suitable system.
TMS320LF2407 is also referred to as DSPhttp: //the article.ednchina.com/word/231697.aspx controller, be that TI company controls and design at motor, inverter, robot, Digit Control Machine Tool etc. specially.TMS320LF2407 adopts the static CMOS technology of high-performance, makes supply power voltage reduce to 3.3V, has reduced the power consumption of controller; The execution speed of 30MIPS makes the instruction cycle shorten to 33ns (30MHZ), thereby has improved the real-time control ability of controller.It has comprised two task manager module EVA and EVB, can realize: three-phase inverter control; The symmetry of PWM and asymmetric waveform; 3 capturing units; 16 passage A/D converters.The task manager module is applicable to control AC induction motor, brshless DC motor, switched reluctance machines, stepping motor, multipolar dynamo and inverter.
Though the TMS320LF2407 chip internal comprises two 10 A/D modular converter, can only sample and change two input channels simultaneously, do not satisfy sample the simultaneously requirement of multichannel of motor monitoring system.MAX126 is 14 of MAXIM company high speeds of producing comparison A/D conversion chip one by one, and 4 road synchronized samplings/retainer can be sampled simultaneously to the signal of 4 passages.
Display circuit is core with AT89S52, and LCD MODULE adopts DMT32240T035.
The native system communicating circuit adopts the bus-type distributed network structure.Each protector http://article.ednchina.com/word/231698.aspx is set up the RS485 communication bus by MAX485, connects by the RS232/RS485 transition card between PC, PLC or DCS and the RS485 bus.The MAX485 chip is the RS485 chip, and two control ends are by DSPhttp: //two I/O mouths controls of article.ednchina.com/word/231697.aspx, be responsible for the selection of the transmission direction of data in addition by an I/O mouth.
Native system also can adopt the radio communication between communication realization and PC, PLC or the DCS.
Wireless communication section adopts the ZigBee wireless network of present wireless industrial control field maturation, and adopts communication modular, reduces the mutual interference mutually with system to greatest extent.
By wired or wireless various combined communication modes, can finish building of complicated communication network, can better finish user's complicated applications environment.
The function of PC provides good operation interface, allows the manager to revise parameter.The manager can be to each protector transmitting control commands by operation interface.Protector can receive the order of main frame, according to the combined floodgate or the tripping operation of command driven electric equipment, and measures each electric parameter, and electric parameter is transferred to the display module demonstration.The display part uses the LCD module to show electric parameter.
The protection actuating circuit is according to each aggregation of data computing of collecting, determines motor when having fault or manual emergency to stop, and drives the actuating of relay by routine processes, protected the safety of motor or Field Force's equipment.
Design of System Software: the hardware operation platform has been arranged, must design the effect of its application of corresponding software competence exertion.Because the flexibility of software, can be according to requirement change, the increase and decrease at any time of system, so the intelligent http://article.ednchina.com/word/231699.aspxization degree of system very major part depends on whether software configuration is reasonable, and whether function is comprehensive.
Main collection, computing, the judgement of being responsible for real time data of control program part, and make corresponding emergency processing, finish protection operation automatically to motor.
As schematically shown in Figure 5, process probably is: system powers on, each functional module of program initialization; beginning data acquisition computing, response manually boots, stops, and has judged whether warning; whether need to shut down; whether need to start, will export startup, shut down if desired and will directly export shutdown if normal need starts; if for manual shut-down will directly be finished by hardware;, do not guarantee absolute shutdown, communication process and renewal liquid crystal display content when last by dsp processor.
Keyboard portion be responsible for controller the parameter setting, show operation such as switching.
Button part is responsible for controlling opening, stopping of motor, comprises promptly stopping, and promptly stops to adopt hardware-in-the-loop directly to realize, not by DSP, guarantees can stablize disconnection when promptly stopping.
Display routine is responsible for showing in real time current each parameter value and each state value, and shows information such as whether current each warning amount, time of origin, user confirm in real time.
As schematically shown in Figure 6, mainframe program: send request, the wait slave is replied, and finishes communication failure if the super certain number of times of no response is thought; If reply, send request of data, to reply if return correctly, communication is finished, and a request of data is not sent out in continuations is reached and thinks communication failure behind certain number of times, end if having to return correctly to reply.
The slave program: receive interrupt response, this machine address is not to finish; The Shi Benji address, the response function code, respective request is handled in response, finishes.
The partly responsible main frame of communication program is communicated by letter with slave.Main frame is sent out handshake in the mode of broadcast mode or poll, and slave is received and sent the respective request data after the information that conforms to own address behind the return information, finishes communication.
Claims (6)
1. integrated protection controller for wireless intelligent motor, it is characterized in that: it comprises
The DSP processing center is used for the associative operation of each analog quantity of calculation process, digital quantity, operating electrical machines start and stop simultaneously, the real content of decision LCD, response and acknowledge communication function;
Power supply is used for the electric energy of whole system is supplied with;
The DI loader is used for the input of user DI signal and gathers;
The DO follower is used for the output of user DO control signal;
LCD dot matrix colour liquid crystal display device is used for providing the relevant interface that shows to the user;
The ZigBee wireless network is used for the wireless monitor data communication of field apparatus and Surveillance center or equipment and equipment;
485 bus communication networks are used for the wireless monitor data communication of field apparatus and Surveillance center or equipment and equipment;
232 serial communication networks are used for that host computer reads field equipment data or the communication of software upgrading;
The AO follower is used for the AO output control of user to field apparatus;
Keyboard is used for the on-the-spot associative operation of user.
2. integrated protection controller for wireless intelligent motor according to claim 1 is characterized in that: ZigBee wireless network, 485 bus communication networks, 232 serial communication networks connect host computer centralized control, monitoring, display respectively.
3. integrated protection controller for wireless intelligent motor according to claim 1 is characterized in that: power supply use the 380VAC alternating current through voltage pressure, current transformer after the AD converter conversion.
4. integrated protection controller for wireless intelligent motor according to claim 1 is characterized in that: the DSP processing center with open, stop, data processing and emergency stop push button be connected.
5. integrated protection controller for wireless intelligent motor according to claim 1 is characterized in that: the CPU of DSP processing center selects the TMS320LF2407 of TI company for use.
6. integrated protection controller for wireless intelligent motor according to claim 1; it is characterized in that: the native system communicating circuit adopts the bus-type distributed network structure; each protector http://article.ednchina.com/word/231698.aspx is set up the RS485 communication bus by MAX485, realizes data communication control by the connection of RS232/RS485 transition card or each protector http://article.ednchina.com/word/231698.aspx by the ZigBee wireless network between PC, PLC or DCS and the RS485 bus.
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| CN200910309519A CN101764550A (en) | 2009-11-10 | 2009-11-10 | Integrated protection controller for wireless intelligent motor |
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| CN200910309519A CN101764550A (en) | 2009-11-10 | 2009-11-10 | Integrated protection controller for wireless intelligent motor |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323725A (en) * | 2012-03-23 | 2013-09-25 | 辽宁省电力有限公司锦州供电公司 | Low voltage switch box short circuit tester |
| CN103699032A (en) * | 2013-12-11 | 2014-04-02 | 山西华控伟业科技有限公司 | Intelligent comprehensive monitor of three-phase motor |
| CN105759678A (en) * | 2015-12-09 | 2016-07-13 | 重庆川仪自动化股份有限公司 | Switching quantity output module of DCS |
| CN106571618A (en) * | 2016-08-31 | 2017-04-19 | 鲁西工业装备有限公司 | High-sensitivity low-voltage motor automatic protection device and method |
| CN106647540A (en) * | 2017-02-15 | 2017-05-10 | 吉林大学 | Multifunctional displacement table system |
| CN106849013A (en) * | 2017-02-17 | 2017-06-13 | 江苏嘉顿威尔电气有限公司 | Multi-function motor comprehensive control protector |
| CN107086645A (en) * | 2017-06-29 | 2017-08-22 | 贵阳永青仪电科技有限公司 | A kind of safety protective circuit of the electric device of serial connection charge parallel discharge |
| CN107658849A (en) * | 2017-07-18 | 2018-02-02 | 北京电联港电器设备有限责任公司 | Intelligent low-pressure comprehensive safety protection device |
| CN110014876A (en) * | 2017-08-23 | 2019-07-16 | 法雷奥西门子新能源汽车(德国)有限公司 | Method for the air gap torque of limits synchronization motor in case of a fault |
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2009
- 2009-11-10 CN CN200910309519A patent/CN101764550A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323725A (en) * | 2012-03-23 | 2013-09-25 | 辽宁省电力有限公司锦州供电公司 | Low voltage switch box short circuit tester |
| CN103323725B (en) * | 2012-03-23 | 2016-03-30 | 辽宁省电力有限公司锦州供电公司 | Low voltage switch box short circuit tester |
| CN103699032A (en) * | 2013-12-11 | 2014-04-02 | 山西华控伟业科技有限公司 | Intelligent comprehensive monitor of three-phase motor |
| CN103699032B (en) * | 2013-12-11 | 2016-05-25 | 山西华控伟业科技有限公司 | A kind of intelligent comprehensive watch-dog of three phase electric machine |
| CN105759678A (en) * | 2015-12-09 | 2016-07-13 | 重庆川仪自动化股份有限公司 | Switching quantity output module of DCS |
| CN106571618A (en) * | 2016-08-31 | 2017-04-19 | 鲁西工业装备有限公司 | High-sensitivity low-voltage motor automatic protection device and method |
| CN106647540A (en) * | 2017-02-15 | 2017-05-10 | 吉林大学 | Multifunctional displacement table system |
| CN106849013A (en) * | 2017-02-17 | 2017-06-13 | 江苏嘉顿威尔电气有限公司 | Multi-function motor comprehensive control protector |
| CN107086645A (en) * | 2017-06-29 | 2017-08-22 | 贵阳永青仪电科技有限公司 | A kind of safety protective circuit of the electric device of serial connection charge parallel discharge |
| CN107086645B (en) * | 2017-06-29 | 2023-08-18 | 贵阳永青仪电科技有限公司 | Safety protection circuit of electric device with series charging and parallel discharging functions |
| CN107658849A (en) * | 2017-07-18 | 2018-02-02 | 北京电联港电器设备有限责任公司 | Intelligent low-pressure comprehensive safety protection device |
| CN110014876A (en) * | 2017-08-23 | 2019-07-16 | 法雷奥西门子新能源汽车(德国)有限公司 | Method for the air gap torque of limits synchronization motor in case of a fault |
| CN110014876B (en) * | 2017-08-23 | 2024-03-29 | 法雷奥西门子新能源汽车(德国)有限公司 | Method for limiting the air gap torque of a synchronous machine in the event of a fault |
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Open date: 20100630 |